Anyway, I am the developer of the OpenFIMG project (formerly GLES6410), which is aiming to provide proper OpenGL support on devices with FIMG 3DSE 3D engine, found in S3C6410, S5PC100 and probably also in S5P6442. The project is in a pretty advanced state as it is already capable of running Android 2.3 with hardware acceleration. Still many OpenGL extensions and some core features (like lighting) are still missing. More info can be found here: https://github.com/tom3q/openfimg/wiki.
It is very likely (and almost confirmed) that the SoC used in Galaxy 3 (S5P6442) contains the same GPU as the one in S3C6410, which is the chip inside Galaxy Spica and similar phones, at least basing on what Quadrant and GLbenchmark show and on GL libraries supposed to be dumped from Galaxy 3.
What I am trying to say is that my project may also be useful on Galaxy 3, but I am the only developer working on it and I am doing it in my free time, so it does not progress as fast as one may expect. In other words, I am looking for some other developers interested in this project.
If you are interested, then do not hesitate to drop me a PM.
Mod EDIT : moving this to development
EDIT: Attached some documents about FIMG 3DSE (based on S3C6410 documentation and my reverse engineering)
EDIT: The project has been successfully used on G3. Builds of ICS for G3 use OpenFIMG as primary graphics driver currently and there are update packages for CM7.